Chapter 40 Flashcards
What did amphibians evolve from?
Love finned fishes.
What are 5 characteristics that most amphibians share?
1) Moist and scaleless skin.
2) Webbed feet
3) Using gills, skin, and lungs for respiration.
4) Return to water for external fertilization.
5) Metamorphosis
Classify Anura.
Domain: Eukarya
Kingdom: Animalia
Phylum: Chordata
Class: Amphibians
Order: Anura
What are the functions of the skin in amphibians?
Respiration, and protection.
How does amphibian skin provide protection from predators?
Mucus glands in some species secrete poisonous substances.
What are the weaknesses of Amphibians?
1) Dehydration, which is why they’re usually active at night, so they can prevent water loss.
2) water pollution.
What part of an amphibian is designed to absorb the impact of landing?
Pectoral girdle.
How many heart chambers do amphibians have?
Three.
What triggers metamorphosis?
Thyroxine.
What happens during metamorphosis?
Legs develop.
Tails and gills disappear.
Lungs become usable.
What unique mechanism is used to ventilate their lungs?
Positive pressure breathing.
What is positive pressure breathing?
Slide 25 also in photos (FROG)
